What is a DPF?

You may have noticed that Maitland Motors have become a part of The DPF Doctor network, but what does this mean for you? (If you drive a petrol vehicle then nothing. Petrol vehicles are not fitted with a DPF, you don’t need to worry.)  

Our diesel customers may have heard or have had issues with their DPF, so how can we help you? 

What is a DPF? 

Your DPF (diesel particulate filter)  helps limit the amount of pollution (soot) emitted from diesel vehicles entering our atmosphere, improving emissions. New Euro 5 exhaust emissions legislation made it mandatory for all diesel to be fitted with a DPF from 2009 onwards.  

The DPF works by carrying out a process called DPF Regeneration. DPF regeneration is when the excess soot, which has been trapped and collected by the DPF, is burnt off at a very high temperature. Burning is activated in 1 of 2 ways, Passive or Active

Passive DPF Regeneration is activated when the exhaust temperature is high enough so that the DPF can do its job of burning off the soot. These high temperatures only take place at speeds of at least 40 mph driven for at least 15 minutes. In other words, a nice long drive on the motorway should activate your DPFs passive regeneration without you having to do anything special. You could have issues with this if you tend to take short, slow, stop-start journeys when the vehicle doesn’t have the chance to get to a high enough temperature to activate the process. Factors that could also cause issues inc, lack of maintenance, wrong oil or driving on empty.  

Active DPF Regeneration is activated when the filter reaches 45% capacity (soot collected) and fuel is injected automatically. This increase in fule makes the exhaust temperature rise so that it can then burn off the soot. Regeneration is activated on longer journeys, so again, if you tend to do low, slow miles, the DPF won’t have the chance to do its job. 

Looking after your DPF will save you costly repairs and help your diesel run safely and efficiently, new DPFs can cost at least £1000! So if you notice the DPF warning light is on, then taking your vehicle for a nice long drive may be all that’s needed to start the regeneration process (especially if you’ve been working from home or not travelling much). If your light is still on or it’s stating a full DPF it may be time for an expert in DPF care to inspect and diagnose the issues. 

Alongside the leading industry knowledge and products from our friends at The DPF Doctor, we can help keep your DPF running and doing its job. Firstly, we would be to carry out a DPF Assessment, which includes specific tests and measurements using our extensive training. This costs £75 + vat and you will be given a full report on the condition of your DPF and what the next steps (if needed) are to get your DPF running smoothly and efficiently again.  (All works advised are under no obligation.)

Please call or email our office with any questions or if you would like to book a DPF assessment. 

Should I service my car?

Here at Maitland Motors, we understand that sometimes you have to priorities where and when you spend your money. Often, the family vehicle is near the bottom of those priorities; a birthday, new school shoes or an unexpected bill often needs paying first. However, keeping your vehicle maintained is a proactive way to prevent unexpected garage bills and can help the funds you do spend go further.


Following your manufacturer’s service schedule is an easy and effective way to get the most from your vehicle. (You’ll find this in your vehicle’s manual or your dash might pop up with a reminder.)

Why should I service my car?
Regular servicing ensures that essential parts (brakes, suspension, etc) are running efficiently and to your needs and requirements. The more miles you drive, the more you should expect parts to deteriorate due to wear and tear. It can also give our technicians the chance to spot and nip potential problems in the bud before they develop into an expensive, lengthy repair that otherwise could have been avoided. Regular servicing also helps the vehicle maintain its value price if you decide to resale.


My car passed its MOT, does it still need a service?
Your MOT is a legal requirement set out by the DVLA that checks the roadworthiness of a vehicle. To pass, it only needs to meet the minimum road safety and environmental standards. Some MOT checks will overlap with a service, however, not everything is checked such as testing the condition of your oil and filters. The main difference is your MOT ensures your car is safe at the time of testing, services are a maintenance measure to help prolong its lifespan, improve efficiency and lower economic costs.


Meaning if you want to save money in the long run, we would always recommend servicing your vehicle. Like we say here in the workshop, prevention is always better than cure. Especially, when it comes to cars!!
To help spread the cost of your service we also offer Payment Assist where you can spread the cost of your bill over 4 monthly payments, fee and interest-free. (Please ask for more details.)


To book a service here at Maitland Motors drop us an email or call our office. We always use OE quality parts on all services such as Millers Oil and Mann Filters. Your vehicle is also given a Free Health Check as standard, breaking down our findings & costs involved.

#TIPTHURSDAY Do you know your vehicle’s prefered oil?

Did you know that each make and model of vehicle has a preferred oil as per the manufactures specifications?

Due to each make/ model being designed differently with individual stresses and strains to deal with on engine components. Manufacturers have designed the vehicle to work with oil of a certain grade and viscosity to help your engine cope.


It is vitally important that the correct engine oils are used, especially in modern engines to ensure engine longevity, better emissions, and prevent internal carbon build-up. Using the incorrect oil results in poor lubrication, affecting the performance of your engine, and incurring costly repairs.


Here at Maitland Motors, we are proud to work with leading industry expert, Miller Oils. They have a very handy search tool on their website where you can check which oil your vehicle is designed to take. (Click here to check now.) You just pop in your reg and it provides you with which product is best to use.

Otherwise, we are always more than happy to check and supply the correct oil for you and your vehicle.

Please share this post with friends and family or if you have any further questions just get in touch.